Curvilinear-sawing machine



UNITED STATES PATENT OFFICE.

SHELDON WARNER, OF ENFIELD, MASSACHUSETTS.

CURVILINEAR-SAWING MACHINE.

Specification of Letters Patent No. 13,055, dated June 12, 1855.

To all whom t may concern Be it known that I, SHELDON IVARNER, ofEnfield, in the county of Hampshire and State of Massachusetts, haveinvented a new and Improved Machine for Sawing Scrolls or CurvedArticles by Means of Patterns; and I do hereby declare that thefollowing is a full, clear, and exact description of the same, referencebeing had to the annexed drawings, making a part of this specification,in which- Figure 1, is a vertical section of my improved machine. a2,fc, Fig. 2, shows the plane of section. Fig. 2, is a horizontal sectionof ditto. y, y, Fig. l, shows the plane of section. Fig. 3, is anenlarged detached horizontal section of the parts by which one of thesaws is operated. y, y, Fig. l, shows the plane of section. Fig. 4, is adetached view of the device for straining and securing the saws to thesash or frame.

Similar letters of reference indicate corresponding parts in the severalfigures.

This invention relates to a new and improved machine for sawing scrollsor curved articles by means of patterns, and consists in the peculiarmeans employed by which the saws are turned by the pattern and theircutting edges presented properly to the stuff so as to cut in therequired direction.

The invention also consists in the peculiar mode of straining andsecuring the saws in the sash or frame as will be hereafter shown anddescribed.

To enable others skilled in the art to make and use my invention, I willproceed to describe its construction and operation.

A represents the frame of the machine, constructed in any proper mannerto support the working parts.

B represents a saw frame or sash which works in suitable guides (a) (a)attached vertically to the frame A. This saw frame or sash has avertical reciprocating motion given it in any proper manner.

C, represents a carriage which works horizontally in suitable guides onthe upper part of the frame A. One side of this carriage is providedwith arms, (b) (o) to the,

outer ends of which a pattern D is secured of the shape or formcorresponding to that in which the stuff is to be sawed. The pattern Dis secured in a horizontal position as shown in Figs. 2 and 3.

In the saw frame or sash B, there are placed two lateral vibratingframes E, F.

G, G, are fiat vertical bars secured to the i strips (c) between pins orguides so that said bars may move laterally with the frames E, F, and atthe same time allow said frames to move up and down while they remainstat-ionary, or at least do not move vertically with said frames. Thebars G, G, have blocks (g) attached to them at about their centers, saidblocks working in a groove in a horizontal bar I-I, attached to theframe A, see Figs. l and 2. The two bars Gr, G, are connected by aspiral spring I, shown in Fig. l.

J, J, are saws of the usual construction and form employed in scrollsawing. There is a saw attached to each of the frames E, F, and in thefollowing manner: The upper and lower end of each saw is secured to abow (7L) see Figs. l and 4. Each bow has a screw (i) passing through itsouter end and the points or ends of the screw bear upon the ends of thestrips (c) of the frames E, F. By turning the screws therefore the sawsare strained and secured in the frames E, F, and the saws are alsoallowed to turn on the points of the screws as the bows (i1.) will clearthe ends of the strips (c) see Fig. 1.

The pattern D, it will be seen is placed between the two flat bars G, G,and the stuff to be sawed, shown in red, isplaced upon the carriage C.

To the upper and lower ends of the saws J, J, there are securedshorttransverse bars (j), to the ends of which rods (la) are attached,at one end, t-he opposite ends of the rods being attached to transversebars (Z) on the vertical rods see Figs. l, 2 and 3. To the centers ofthe vertical rods there are attached by loops or staples (m), rods' (n)two to each rod (f) and at opposite sides. The outer ends of these rods(n) are The operation will readily be understood. A reciprocating motionis given the saw frame or sash B, and the carriage C, is moved by handor otherwise, the stuil being placed upon it. The pattern D of coursemoves with the carriage C, and as the rods (n) bear against its sides oredges, the rods (f) (f) and saws J J, will be turned so that their teethor cutting edges will be in the proper direction and cut the stuff, theprecise form of the pattern. The frames E, F, are also moved by thepattern D in one direction, the return movement being given by thespring I. In consequence of the saw being strained by the bows (IL) andscrews as shown t-he saws are allowed to turn easily and at the sametime are securely attached to their frames E, F.

The above invention is extremely simple, and works well in practice;either one or two saws may be used, but when both edges of the patternare curved two saws will be necessary or essential as the stuff would besawed in one operation.

rIhe machine is applicable for sawing all sorts of scroll, or curvedwork, such as chair stuffs etc. The saws may be turned at an angle of450 and saw well. The feed motion of the carriage is retarded of course1n proportion to the angle at which the saws are working. The saws cutvery smooth, and after finishing is not required.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent, is,

l. Placing the saws J, J, in frames E, F, which are allowed to movelaterally in the saw frame or sash B, and having said saws so attachedto the frames E, F, as to be allowed to turn therein, said saws beingturned by means of the rods (le) (n) attached to tranverse bars (Z) onthe vertical rods (f) the rods (f) being turned by the rods (n) andlevers (p), the outer ends of the rods bearing against the pattern D,and operated as said pattern moves as herein shown and described.

2. I claim straining and attaching the saws J, J, to the frames E, F, byhaving bows (7L) attached to the ends of the saws and screws passingthrough them, the ends of said screws resting upon the top and bottomstrips (c) of the frames E, F, as herein described.

SHELDON /VARNER. Vitnesses:

EBEN H. RooKwooD, CHARLES RICHARD.

